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Product builds

Product-shaped systems and business experiments.

Where I explore markets, workflows, and operational problems from idea to implementation.

ProductShippedPrivate beta

Farmica

Order operations for direct-to-consumer farms — a spletna naročilnica that collects scattered channel orders into one weekly workflow.

  • Next.js
  • React
  • TypeScript
  • next-intl
  • Tailwind CSS
  • Vercel
  • Brevo
  • Google Analytics 4
View buildVisit
ProductShippedDemo available

Izložbica

Izložbica is a multi-tenant storefront and backoffice platform for creators who sell physical products through small catalogues, direct orders, pickup, delivery, and manual payment workflows. It gives sellers a simple public izložbica plus a private Pisarna for products, orders, stock, payments, and customer handling.

  • Next.js
  • React
  • TypeScript
  • Payload CMS
  • PostgreSQL
  • next-intl
  • TanStack Form
  • Zod
  • Radix UI
  • Stripe
  • Brevo
  • S3-compatible storage
  • Playwright
  • Vitest
  • pnpm
View buildLive demo
ProductActivePrivate

Arheko

Arheko is a document intake and processing platform for accounting workflows — upload or email documents, run OCR and AI classification, extract structured fields, and route items through a review queue before filing.

  • Next.js
  • React
  • TypeScript
  • Payload CMS
  • PostgreSQL
  • Neon
  • Vercel
  • Brevo
  • RunPod
  • GLM-OCR
  • OpenAI-compatible LLM API
  • Backblaze B2
  • PWA
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ProductShippedPrivate

Rekreacija

Rekreacija is a sports participation and organizer operations platform for recreational leagues and events. It helps players discover sessions, join games, track participation, and gives organizers a dedicated office for leagues, events, attendance, and payment visibility.

  • Next.js 16
  • React 19
  • TypeScript
  • Payload CMS 3
  • Postgres
  • Tailwind CSS
  • shadcn/ui
  • Radix UI
  • Server Actions
  • Payload Local API
  • Kotlin
  • Jetpack Compose
  • Android
  • Vitest
  • Playwright
View buildGitHub
ProductActiveClosed source

Vault

Vault is a customer-hosted, end-to-end encrypted messaging system for professional teams that need to own their communication infrastructure. It is built around a Go relay server, PostgreSQL, and a Kotlin Android client using OpenMLS for MLS-based encryption.

  • Go
  • PostgreSQL
  • Kotlin
  • Jetpack Compose
  • OpenMLS
  • Rust JNI
  • Android Keystore
  • Room
  • SQLCipher
  • OkHttp WebSocket
  • Docker Compose
  • UnifiedPush
  • ntfy
  • AES-256-GCM
View build

What these builds show

These builds show how I think beyond implementation: identifying a problem, forming a thesis, building the first version, and learning whether the workflow or market deserves more investment.

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Build with Matija

Moderne Websites, Content-Systeme und KI-Workflows für langfristiges Wachstum.

Leistungen

  • Headless-CMS-Websites
  • Next.js- & Headless-CMS-Beratung
  • KI-Systeme & Automatisierung
  • Website- & Content-Audit

Ressourcen

  • Case Studies
  • Wie ich arbeite
  • Blog
  • Themen
  • CMS-Hub
  • E-Commerce-Hub
  • B2B-Website-Strategie
  • Dashboard

Headless CMS

  • Payload CMS Entwickler
  • CMS-Migration
  • Multi-Tenant CMS
  • Payload vs Sanity
  • Payload vs WordPress
  • Payload vs Contentful

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